Heat exchanger, air conditioner and external unit

A heat exchanger comprising a plurality of heat radiating fins, end plates sandwiching said plurality of heat radiating fins and a tube inserted to each of end plates, freely expanding and shrinking radially in a direction crossing the longitudinal direction of a tube from tube opening portion side of a tube protruded from an end plate, and a surface expanding radially toward the direction of a tube at outer circumference, the heat exchanger is manufactured by:

• causing a gripping body base with a gripping body having a plurality of tube contacting members which can cover said tube to move toward a heat exchanger, and, thereafter, stopping the movement of a gripping body base toward a heat exchanger by causing a moving gripping body base to come into contact with a reference platform setting protrusion length of a tube protruded from an end plate, and, after that, firmly fixing and holding said gripping body base and a reference platform through a locking means, and, thereafter, forming a tube expansion in predetermined length by pressing a tube expansion mandrel into a tube opening portion of a tube protruded from an end plate, wherein a tube expansion mandrel exists in said gripping body in freely reciprocating fashion, and, after that, gripping a tube expansion by said plurality of tube contacting members through causing a sliding base with a gripping body sliding means fitting onto and sliding on a gripping body which is provided between said end plate and a gripping body base and has a plurality of tube contacting members to move toward a heat exchanger, and, thereafter, connecting said flare base and a gripping body base, wherein a flare base exists more rearward than a gripping body base with a certain distance, has a predetermined length so that a tube expansion mandrel becomes fitting onto condition within a gripping body base and has a flare pipe with a flare punch for flared processing at the tip, conducting a predetermined flared processing by pressing a flare punch into a tube expansion at tube opening side through pulling toward a gripping body base, which is firmly fixed and held to a reference platform through locking means, via a connecting and tensile force generating means that generates a tensile force in a direction of pulling toward each other with a certain distance, and, thereafter, releasing a tube expansion from a gripping of tube contacting member by causing a sliding base to retreat from a heat exchanger, retracting each of a flare base, a gripping body base 3h and a sliding base from a heat exchanger.

A heat exchanger comprising a plurality of heat radiating fins, end plates sandwiching said plurality of heat radiating fins and a tube inserted to each of end plates, freely expanding and shrinking radially in a direction crossing the longitudinal direction of a tube from tube opening portion side of a tube protruded from an end plate, and a surface expanding radially toward the direction of a tube at outer circumference, the heat exchanger is manufactured by:

• causing a gripping body base with a gripping body having a plurality of tube contacting members which can cover said tube to move toward a heat exchanger, and, thereafter, stopping the movement of a gripping body base toward a heat exchanger by causing a moving gripping body base to come into contact with a reference platform setting protrusion length of a tube protruded from an end plate, and, after that, firmly fixing and holding said gripping body base and a reference platform through a locking means, and, thereafter, causing a part of the tip of a flare punch to enter into a tube opening portion by moving said flare base having a flare pipe with a flare punch for a flared processing at the tip of a tube opening portion and maintaining the contact, when a tube expansion in predetermined length is formed by pressing a tube expansion mandrel into a tube opening portion of a tube protruded from an end plate, wherein a tube expansion mandrel exists in said gripping body in freely reciprocating fashion, and, thereafter, gripping a tube expansion by a plurality of tube contacting members through causing a sliding base with a gripping body sliding means fitting onto and sliding on a gripping body which is provided between an end plate and a gripping body base and has a plurality of tube contacting members to move toward a heat exchanger, and, thereafter, connecting said flare base and a gripping body base while expanding a tube or after a tube expansion by moving a tube expansion mandrel again, wherein a flare base exists more rearward than a gripping body base with a certain distance, has a predetermined length, so that a tube expansion mandrel becomes fitting onto condition within a gripping body base, and has a flare pipe with a flare punch for flared processing at the tip, conducting a predetermined flared processing by pressing a flare punch into a tube expansion at a tube opening portion side through pulling toward a gripping body base, which is firmly fixed and held to a reference platform through locking means, via a connecting and tensile force generating means that generates a tensile force in a direction of pulling toward each other with a certain distance, and, thereafter, releasing a tube expansion from a gripping of tube contacting member by causing a sliding base to retreat from a heat exchanger, retracting each of a flare base, a gripping body base and a sliding base from a heat exchanger.